drm/radeon: fix missing bo reservation

Otherwise we might get a crash here.

Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
index 114d1672d616..2aecd6dc2610 100644
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -537,6 +537,10 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
 
                 radeon_vm_init(rdev, &fpriv->vm);
 
+                r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
+                if (r)
+                        return r;
+
                 /* map the ib pool buffer read only into
                  * virtual address space */
                 bo_va = radeon_vm_bo_add(rdev, &fpriv->vm,
@@ -544,6 +548,8 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
                 r = radeon_vm_bo_set_addr(rdev, bo_va, RADEON_VA_IB_OFFSET,
                                           RADEON_VM_PAGE_READABLE |
                                           RADEON_VM_PAGE_SNOOPED);
+
+                radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
                 if (r) {
                         radeon_vm_fini(rdev, &fpriv->vm);
                         kfree(fpriv);